NT has sales of $19,700, net income of $3,517, fixed assets of $18,282, current liabilities of $2,940, current assets of $3,018, long-term debt of $7,600, and equity of $10,760. Assets, costs, and current liabilities are proportional to sales. Long-term debt and equity are not. The company maintains a constant 50 percent dividend payout ratio. The firm is currently operating at full capacity and next year's sales are projected to increase by 17 percent. Long-term debt is the plug variable. Using the information provided above for NT, calculate: Additional debt required.?